JBL 6260 User Manual

esis.
The
output
of the
operational
amplifier
is
normally
positive to
turn
the relay
on and
goes
negative
to
turn it
off.
4.5 CLIP
CIRCUIT
In
the clip
detector
circuit,
transistor
Q36
is
normally
turned
ON, shunting
current
away from
CLIP
LED
DSl.
The peak
output
voltage
of
the amplifier
as it
approaches
the
power
supply
rail
voltage
is
sensed
through diode
CR24 and
resistor
R71 and
turns
the
transistor
OFF, thereby
turning
the
LED
ON.
Capacitor
C38
provides
peak
stretching
to enable
transient
peaks of
short
duration to
be
seen.
4.6
POWER
SUPPLY
The
power
supply is
conventional.
The
AC
voltage
from
transformer
Tl is
rectified by
bridge
rectifier
BRI
and
filtered
by
the
large
storage
capacitors C41
-
C44.
The
resulting
high
voltage,
high current
DC is
used in
the
voltage
and
output
ampli-
fier
stages.
An
additional
winding
from
the
transformer
is
rectified
and
regulated
to
supply
+
15
VDC for
the
operational
amplifiers,
and is
rectified
and
fTltered to
supply
+
24 VDC for
the
relay
coil.
-
25
-

JBL 6260 Specifications

General

Brand	JBL
Model	6260
Category	Amplifier
Language	English